Now Playing: German Shepherd and horse pose for adorable photo shoot

Now Playing: We found the hottest summer destination…and it's this swimming pool full of dogs

Now Playing: ABC News Update: Jeff Bezos, Blue Origin crew land safely after spaceflight

Now Playing: Western Europe flooding, Blue Origin flight, and Dr. Fauci: World in Photos, July 20

Now Playing: Officials won’t rule out canceling Olympics at last minute

Now Playing: Countdown to launch: Jeff Bezos set for history-making Blue Origin space flight

Now Playing: Acid-spraying part spider, part scorpion species is taking over parts of Southwest

Now Playing: Race to find survivors after deadly flood disaster in Europe

Now Playing: New warning against US visits to UK due to COVID levels

Now Playing: ABC News Live Prime: Monday, July 19, 2021

Now Playing: Many Japanese ‘in disbelief’ Olympic games still moving forward

Now Playing: Germany devastated after flooding, as scientists predict more extreme weather

Now Playing: The Rundown: Top headlines today: July 19, 2021

Now Playing: Hundreds still missing in Europe after historic flood

Now Playing: Prince Harry announces memoir scheduled for 2022 release

Now Playing: Olympic COVID-19 protocols put to the test as athletes, officials test positive

Now Playing: The Breakdown: Delta variant spreading as students get ready to go back to school

Now Playing: Delta variant surges in U.S. as England drops restrictions despite rise in cases

Now Playing: Severe flooding, Olympics protest, journalist remembered: World in Photos, July 19